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Die and Clock

It’s mathemagic o’clock! Throw the die and I’ll guess what you rolled.

Choose any number between 1 and 20, move around the clock and I’ll guess your die’s value. Is there a way to always guess right?

A secret arithmetic mean? An introduction to moduli? This trick focuses on mathematical reasoning. The context might look complicated, but the solution is within everyone’s reach. So, get to work!

  • This trick is simple to perform and can easily be done with the whole class using the corresponding GeoGebra.

  • Planning notes